sec theta - sec theta (sin^2 theta)(adsbygoogle = window.adsbygoogle || []).push({});

=(1/cos theta) -(1/cos theta)(sin^2 theta)

sin^2 theta = 1-cos^2 theta

so after subbing this in I got

-cos^2 theta/cos theta

so an equivalent expression would be cos theta?

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# Homework Help: Check expression equivalent to

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